Add Yahoo as a preferred source to see more of our stories on Google. This year is shaping to be a tough flu season, with less than half of adults getting a flu shot. | Hugh Hastings/Getty Images ...

Let’s start with the bad news. There’s a decent chance, perhaps as high as 11 percent if you’re unvaccinated, that some time over the course of this winter, you’ll be overcome with chills, followed by ...